i got error script when install drupal

hi All, dear Friends..
mmph... first i'm sorry if my english is worst.. :(..
i got this note, when i was install drupal in my localhost:
Warning: fopen(./sites/default/settings.php) [function.fopen]: failed to open stream: Permission denied in D:\drupal-64\includes\install.inc on line 235
Warning: Cannot modify header information - headers already sent by (output started at D:\drupal-64\includes\install.inc:235) in D:\drupal-64\includes\install.inc on line 617
Warning: Cannot modify header information - headers already sent by (output started at D:\drupal-64\includes\install.inc:235) in D:\drupal-64\includes\install.inc on line 618
so.. what i have to do..!?
Please help...
best Regards.